This library aims to simplify the construction of JSON API service,
nex.Handler is able to wrap any function to adapt the interface of
http.Handler, which unmarshals POST data to a struct automatically.
BenchmarkSimplePlainAdapter_Invoke-8 5000000 318 ns/op 80 B/op 2 allocs/op
BenchmarkSimpleUnaryAdapter_Invoke-8 1000000 1999 ns/op 1296 B/op 16 allocs/op
BenchmarkGenericAdapter_Invoke-8 500000 2404 ns/op 1456 B/op 17 allocs/op
BenchmarkSimplePlainAdapter_Invoke2-8 1000000 1724 ns/op 1096 B/op 11 allocs/op
BenchmarkSimpleUnaryAdapter_Invoke2-8 500000 3484 ns/op 2313 B/op 25 allocs/op
BenchmarkGenericAdapter_Invoke2-8 500000 3597 ns/op 2473 B/op 26 allocs/op
io.ReadCloser // request.Body
http.Header // request.Header
nex.Form // request.Form
nex.PostForm // request.PostForm
*nex.Form // request.Form
*nex.PostForm // request.PostForm
*url.URL // request.URL
*multipart.Form // request.MultipartForm
*http.Request // raw request
http.Handle("/test", nex.Handler(test))
func test(io.ReadCloser, http.Header, nex.Form, nex.PostForm, *CustomizedRequestType, *url.URL, *multipart.Form) (*CustomizedResponseType, error)
package main
import (
"errors"
"fmt"
"io"
"net/http"
"net/url"
"github.com/lonnng/nex"
)
type LoginRequest struct {
Username string `json:"username"`
Password string `json:"password"`
}
type LoginResponse struct {
Result string `json:"result"`
}
type ErrorMessage struct {
Code int `json:"code"`
Error string `json:"error"`
}
func main() {
// customize error encoder
nex.SetErrorEncoder(func(err error) interface{} {
return &ErrorMessage{Code: -1, Error: err.Error()}
})
// global middleware
nex.Before(before1, before2)
nex.After(after1, after2)
mux := http.NewServeMux()
mux.Handle("/test1", nex.Handler(test1))
mux.Handle("/test2", nex.Handler(test2))
mux.Handle("/test3", nex.Handler(test3))
mux.Handle("/test4", nex.Handler(test4))
mux.Handle("/test5", nex.Handler(test5))
mux.Handle("/test6", nex.Handler(test6))
mux.Handle("/test7", nex.Handler(test7))
mux.Handle("/test8", nex.Handler(test8))
// add middleware
mux.Handle("/test9", nex.Handler(test8).Before(before1, before2).After(after1, after2))
logic := func(ctx context.Context) (context.Context, *testResponse, error) {
println(ctx.Value("key").(string))
println(ctx.Value("key2").(string))
return context.WithValue(ctx, "logic", "logic-value"), &testResponse{}, nil
}
before1 := func(ctx context.Context, request *http.Request) (context.Context, error) {
return context.WithValue(ctx, "key", "value"), nil
}
before2 := func(ctx context.Context, request *http.Request) (context.Context, error) {
println(ctx.Value("key").(string))
return context.WithValue(ctx, "key2", "value2"), nil
}
after1 := func(ctx context.Context, w http.ResponseWriter) (context.Context, error) {
println(ctx.Value("key").(string))
println(ctx.Value("key2").(string))
println(ctx.Value("logic").(string))
return context.WithValue(ctx, "after1", "after1-value"), nil
}
after2 := func(ctx context.Context, w http.ResponseWriter) (context.Context, error) {
println(ctx.Value("key").(string))
println(ctx.Value("key2").(string))
println(ctx.Value("logic").(string))
println(ctx.Value("after1").(string))
return context.WithValue(ctx, "key", "value"), nil
}
handler := Handler(logic).Before(before1, before2).After(after1, after2)
mux.Handle("/context", handler)
http.ListenAndServe(":8080", mux)
}
// POST: regular response
func test1(m *LoginRequest) (*LoginResponse, error) {
fmt.Printf("%+v\n", m)
return &LoginResponse{Result: "success"}, nil
}
// POST: error response
func test2(m *LoginRequest) (*LoginResponse, error) {
fmt.Printf("%+v\n", m)
return nil, errors.New("error test")
}
// GET: regular response
func test3() (*LoginResponse, error) {
return &LoginResponse{Result: "success"}, nil
}
// GET: error response
func test4() (*LoginResponse, error) {
return nil, errors.New("error test")
}
func test5(header http.Header) (*LoginResponse, error) {
fmt.Printf("%#v\n", header)
return &LoginResponse{Result: "success"}, nil
}
func test6(form nex.Form) (*LoginResponse, error) {
fmt.Printf("%#v\n", form)
// use form helper method
// start := query.IntOrDefault("start", 0)
// count := query.IntOrDefault("count", -1)
return &LoginResponse{Result: "success"}, nil
}
func test7(header http.Header, form nex.Form, body io.ReadCloser) (*LoginResponse, error) {
fmt.Printf("%#v\n", header)
fmt.Printf("%#v\n", form)
return &LoginResponse{Result: "success"}, nil
}
func test8(header http.Header, r *LoginResponse, url *url.URL) (*LoginResponse, error) {
fmt.Printf("%#v\n", header)
fmt.Printf("%#v\n", r)
fmt.Printf("%#v\n", url)
return &LoginResponse{Result: "success"}, nil
}curl -XPOST -d '{"username":"test", "password":"test"}' http://localhost:8080/test1
curl -XPOST -d '{"username":"test", "password":"test"}' http://localhost:8080/test2
curl http://localhost:8080/test3
curl http://localhost:8080/test4
curl http://localhost:8080/test5
curl http://localhost:8080/test6\?test\=test
curl http://localhost:8080/test7\?test\=tset
curl -XPOST -d '{"username":"test", "password":"test"}' http://localhost:8080/test8\?test\=test
Copyright (c) <2016> chris@lonng.org
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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